Osmolator pumping too much water

[jbilliel]

I have a new tank that is only about 45 days old and I am having problems with my tunze osmolator. The sensor/float is in the return section of my sump with the overflow container and pump right next to it. My problem is that about 25% of the time the sensor doesn't stop the water correctly and then the secondary float sensor stops it. This then causes the skimmer to boil over and more water gets pumped in causing one heck of a mess. I thought that perhaps the vibration from the return pump was causing noise for the sensor so I moved it all the way to the back, but that doesn't seemed to have helped. I also moved the water from the tunze pump to a different section of the sump so the water movement wouldnt disrupt the sensor.

Does anyone have any ideas on how to improve the performance? I am a rookie to saltwater so take it easy on me! lol

 

[jbilliel]

You can see that the black line on the front of the sump on the second picture is the water level when the sensor is working correctly.

 

[Water Dog]

Based on the position of the outlet of the black tube in relation to the water level in your ATO resercoir, it looks like you may be experiencing a siphoning event. Put the outlet of the black tube up on the rim of your sump’s return section and make sure the water level in your ATO reservoir is NEVER higher than the outlet of the black tube.

 

[Water Dog]

I have the same Trigger sump. See the white line? That is my ATO line. That is pretty much how you should position your black Tunze output line. Again, make sure the water level in your ATO is never higher than the end of your ATO outlet line.

 

[jbilliel]

Got it! That’s very helpful! Thank you!